Clutch-operating mechanism for power presses



y E. w. ZEH

CLUTdH OPERATING MECHANISM FOR POWER PRESSES File d Aug, 29, 1925 2 Sheets-Sheet 1 INVENTOR. Y SW M wwfim TORNEYS,

E. W. ZEH

CLUTCH OPERATING MECHANISM FOR POWER PRESSES Filed Auz. 29, 1925 2 Sheets-Sheet 2 J ByM/ilwlazvrom Y m? P 1' ATTbRAIEYs Patented May 31, 1927.

warren stares EDMUND W. ZEH, OF NEWARK, NEW JERSEY.

" v CLUTCH-OPERATING MECHANISM FOR POWER PRESSES.

Application filed. August 29, 1925. Serial No. 53,239.

I to-said throw-out in order to necessitate a separate manual operation of it for each stroke of the press; to thus enable the press 7 to be operated continuously by a workman when extreme care is not required, and to be operated by a separate actuation of the throw-out for each stroke when great care is necessary; to secure a new and simple construction for this purpose, and to obtain other advantages and results as may be brought out by the following description. Referring to the accompanying drawings, in which like characters ofreference indicate the same parts in the several views,

Figure 1 is a side elevation of a press embodying my invention, showing the parts in position for repeated strokes or continuous action of the press upon depression of the operating rod, with the driving wheel removed for greater clearness; Figure 2 is a similar view on a larger scale with the parts in position for the press to automatically stop at the completion of v a single stroke upon depression of the operating rod; 1 I

Figure 3 is a section on line 3-3 of Fig. 2, looking in the direction indicated by the arrows; v

Figures 4 and 5 are. views showing the engagement of the operating rod with the throw-out forintermittent and for continuous action of the press, respectively;

7 Figure 6 is a section on line 66 of Fig. 5, looking in the direction indicated by the arrows, and

Figure 7 is a detail view partly in section of a certain arm for positioning the parts for repeated strokes or for single strokes.

In'the specific embodiment of the invention shown in said drawings, 1 indicates the frame of a press having a bed 2, guard 3 and head l adapted to be reciprocated' by a pitman 5 uponthe eccentric (not shown) of a shaft 6 journaled in the upper part of said frame 1. A driving wheel (not shown) is loose-upon said shaft 6 and adjacent to it is a clutch member 7 fast upon the shaft and carrying a clutch pin 8 normally projected by a spring (not shown) to be engaged by the driving wheel. Said clutch member 7 is annularly slotted, and a throw-out 9 pivoted to swing in the plane of said slot has a free end lylng in said slot to engage the clutch pin 8 and retract it from the driving wheel. All said parts as described above are old and well-known in the art so that they need no further description or illustration here, their operation being that when the throwout 9 is swung out of engagement with the clutch pin said clutch pin is automatically projected and. engaged by the driving wheel to carry the shaft around with it, but after the throw-out has been released it automatically returns, as by a spring, to again engage the clutch pin at the end of acomplete rotation and stop the head 4: in raised position. If the throw-out has not been released the press will operate repeatedly or continuously, and sometimes when it is desired to 1,630,882 PATENT" OFFICE,

stop at the end of asingle stroke the operator does not act promptly enough to accomplish it. It is the purpse ofthe present invention to provide a construction additional to that above described which will ensure that when the press isintended to deliver single strokes it will automatically stop at the endof a stroke and not start again except upon a manual act by'the operator, and yet nevertheless it can be set'so as to make repeated strokes or operate continuously the throw-out 9 at its outer end upon a pin or upon a manual act by the operator In carrying out my invention I mount stud 10' projecting froma boss 11 ofrthe frame'l, see Figure 3, said boss having only portions ,of itself machined for the throwout to rest upon, .two of which are indicated by reference numeral '12. Also, upon the r pin or stud 10 is pivoted a casting 13 having a hub portion slotted as at 14: to partly receive the throw-out and securedthereto as by screws 15; arms 16, 17 extend upward and limited so as not to wear against the bottom clutch pin 8.

of the annular groove in the clutch-member the, connecting bar 27, but it is within the Y 7, onone hand, and not to swing any further outwardlyof said groove than to clear the The said casting 13 has a further upwardly and inwardly extending'arm 2O which'at its end slidablyreceives a rod21 which at its other end is pivoted to the frame 1 at a point nearer the clutch member 7 so that an expansion spring 22 upon said rod between its pivoted end and the ar1nv2O normally swings hold the same in position todisengage the clutch pin 8, the lower stop screw 18 engagscope of my invention to accomplish it in any other suitable way. When the arm 29 overliesthe wall of the slot; 38 next the free ing the under edge of the boss 11 all as shown in Figure2.

From a treadle23 at the lower part of the machine a connecting rod 245 extends upward to an arm-25:on a shaft 26lmounted in the 'frame l a little above the bed 2, said shaft carr in the guard 3 so that the same is 0 erb L tion shown in Figure 2, for reasons herein- 'after'explained, the spring 28 in either case drawing the extremity of the connecting bar 27 toward the free end of the arm 29, and

preferably the two positions .of. said arm 29 are determined by some such suitable means is as the following, see Figures 7 and 2.. ,The hub 31 of the said arm 29 is spaced a little from the frame 1, and a spring.32 placed around said i hub, to normally force thearm outward, the outer face ofthe hub being provided with grooves 33, 34 which are adapted oneto receive a radial pin 35 .on the pivot stud 30 in one positionfof the arm andthe other to receive said radial pin in the other "position of the arm; Obviously, by pressing the arm toward the frame it can read- 11y be disengaged from said pin to turn, 1t

from one position to the other, andyetit will not inadvertently escape from either position. j

Where the connecting bar 27 passes the throwout 9 it is preferably narrowed in an edgewise direction, from both edges to form shoulders 36', 37 and said narrowed portion preferably lies in a groove '38 in the throwout 9, which groove is sufliciently wide so that only" one of said shoulders will'hook onto a side wall of the groove at the top of said throw-out at one time, the other shoulder falling enough. short ofthe opposite edge wall of the groove so that if the first "one is disengaged the 27 will slide in the groove 38. This is accomplished in the'construction shown'by making the groove 38 wider than the shouldered portion of end of the throw-out, said connecting bar being el'evated'by the treadle spring 39 so as;

to hold its stop 40 against the lower edge screw 18 engages the underside of the boss 11. With the parts in this position, if'the operator depresses the treadle the clutch pin 8 will spring into engagement with the fly wheel and the head 4 of the press begin to make a stroke; as the clutch member 7 revolves, however, the pin 8 strikes the edge of} the connecting bar 27 'as clearly shown in Figure 2, and: swings it to theright hand as shown, against the pull of the spring 28, suficiently to disengage the throw-out .9 which at once returns to normalposition to engage the clutch pin 8 as it comes around upon the completion of a stroke and stop the press.- It will be noted that this stopremoves his foot from the treadle, and thus I there is no possibility of-a second stroke such as might damage; the work or injure the operator.

into its other position, as shown in. Figure Oh the other hand, if the arm 29 is thrown 1, the shoulder 37 overlies the throwout- 9 7 rat the edge of its groove 38 away from the free end of the throw-out, and upon depression of the treadle 23 to disengage the throw-out 9, said connecting bar 27flies far enough away from the shaft 6 so thatthe clutch pin 8 as it comes around clears said bar and the throw-out 9 remainsretracted or lowered, 1 The press will therefore make repeated stroke-s or operate continuously as long as the operator keeps the treadle 23 his foot off, By my improved construction,

therefore, a,1t ress can be operated in either 1 way, as. may be desired to suitdiifeiient cond1tons,-; and the means for enabl ng this 'lll) depressed, andwill stop only when he takes M are very simple,,eiiicient and not likely to e I get out of order. In both positions of the arm 29. thespring 28 holds the connecting bar 27 in position to engage the throw-out 9 as desired, and it is very quickly andeasily shifted from one position to the other to change from one mode of operation of the press to the other. p

Obviously, various structural modifications. mayi bemade by those skilled .infthe art in carrying out my invention, without departing from the spirit and scope thereof, and therefore Ido'not' desire to be'un- 'derstood as limiting myself except as res.

quired by the following claims when construed in the light of the prior art.

' Having thus described the'.invention, .I cla1ni 1s: j H w I 1. The combination-with. a .power press what having a clutch, and a throw-Out tor'said clutch, of an operating member pivoted at one end and adapted to engage said throwit will be automatically released from the.

throw-outby revolution of the press and in the other of said positions it will be'unat fected by revolution of the press.

2. The combination-with a power press having a clutch, and a throw-out for said clutch, of'an operating bar pivoted at one end and adapted to engage said throw-out, an adjustably mounted member adapted to project at either side of the free end of-said operating bar as desired, and a spring con nection between said member and free end of the bar serving to hold the latter in one position of said member so that it will engage the throw-out and be disengaged by revolution of the press, said spring connection in the other position of the member 'holding the connecting. bar in engagement with the throw-out so that it will be unaffected by revolution of'the press. I

3. The combination with. a power press having a clutch, and a throw-out for said clutch, of an operating bar pivoted at one end and adapted to engage said throw-out I r at both ends of the swing of said bar, said bar being adapted in one position to be disengaged by revolution of the clutch and in the other position to be unaffected thereby, and means for resiliently holding said bar in engagement with the throw-out at each" of its said positions. 7 l j 4. The combination with a power press having a clutch, and a thr0w-out for said clutch, of an operating bar pivoted at one end and adapted to engage said throw-out at both ends of'the swing of said bar, said bar being adapted in one position to be disengaged by revolution. of the clutch and in the other position to be unaffected thereby, a swinging arm adapted to project at either side of the freeend of the operating bar, a spring connection'between said arm and 5. The combination with a power press having a clutch member with a clutch pin, and

a throw-out for said clutch pin, of an unyielding bar for operating said throw-out 'pivoted at its lower end, stops for positioning said bar sci-that lies in path ofsaid clutcli pin and 1 alternately so that it lies out of the path'oit' said-clutchpingandmeans v for resiliently holding .said 'bar swung v against; either of said stops.

6. The combination with a power press having a'fclutch member with a clutch pin,

an'd-a th'row-out for said clutch; pin, ofan unyielding bar for operating said throw-out pivoted at its lower end,- stops on' the throwout for positioning said 'bar in engagement j" therewith so. that it lies in the path of said clutch pin and alternately so that it lies out ofthe path of said clutch pin, and means f for resiliently holding" said 1 bar 1 swung against either ofsaid stopsL- I 7 The combination with a power presshaving a clutch member with a clutch pin, and. a tllIOWEOllt for said clutch pin having spaced stops, of an'unyielding bar for operating saidthrow-out pivoted, at its lower end and adapted to lie against either of said stops to operate "the throw-out, the upper part of said bar in one of such positions being in the path of the clutch pin as itfro-f tates and'in the otherpositionbeingout of said path, and means for resiliently holding said bar swung against either of said stops. 7 8. The. combination with a power press having a clutch, and a throw-out for said clutch, of an operating bar'pivoted at one 7 end and adapted to engagev said throw-out at both ends of the swing of said bar, said bar being adapted in one position to be dis-' engaged by revolution of the clutch andin the other position to be unaffected'thereby,

a swinging arm adapted to'project at either side of the free'end of the operating bar,

and a spring connection between said arm and the free endof the bar, I i

9. The combination with a power press having. a clutch, and a' throw-out for saidv clutch, of an operating :bar pivoted, at one end and adapted to engage said throw-out at both ends of the swing of said bar, said barv being adapted in one position to'be disen- 1 gaged by revolution of the clutch and in the other position to be unaffected thereby a Y spring connection at the free end of the bar, and means for secur ng said spring con v nection to the press at elther-slde ofthe bar.

10. The combination with a'powe'r press having a clutch, and athrow-out for said clutch, of an operatingbar pivoted at one end and adaptedto engage said throw-out at both ends of thes'wingv of said bar, said bar being adapted in one position to be disen- V gaged by revolution of the'clutch and in the the free end of the bar, and means for releasably holding said arm in its positions.

other position to be unaffected thereby, and means for resiliently connecting the free end of the bar to the press at either side of said The combination. withiapower press clutch mounted upon at ,bossfproviding i? shoulders at its iopposi' tesides, of a member secured to said throws-oust be swing therewith I andhamng pro eetlng arms at opposite sides of the throw-out, and st0p;,screWs{1n sa d arms adapted to engage said shoulders. 12. The combination with a power press having a clutch, and -aithrowi out for said clutch mounted upon a bossrproviding shoul- With said shoulder.

ders at its epposite-sides of av member se- .eured to said juhrow out cOIicentrically Withopposite stop screws in' said member toenfga-ge said shoulders, an arm on said member,

and aspring engaging said arm to vnprrnally hold one of said stop screws :inlengagemei t EDMUNDWQ Z I 

